Create and compare ROC curves for any predictive model

November 14, 2018
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Create and compare ROC curves for any predictive model

An ROC curve graphically summarizes the tradeoff between true positives and true negatives for a rule or model that predicts a binary response variable. An ROC curve is a parametric curve that is constructed by varying the cutpoint value at which estimated probabilities are considered to predict the binary event.

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Check out the SAS Student Series during winter break

November 13, 2018
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SAS is launching the SAS Student Series, which bundles thousands of dollars’ worth of training and certification materials into an affordable package for university students and recent graduates. The post Check out the SAS Student Series during wint...
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Define custom color ramps by using the RANGEATTRMAP statement in GTL

November 12, 2018
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Define custom color ramps by using the RANGEATTRMAP statement in GTL

The SGPLOT procedure enables you to use the value of a response variable to color markers or areas in a graph. For example, you can use the COLORRESPONSE= option to define a variable whose values will be used to color markers in a scatter plot or cells in a heat

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Enhancing a congressional district map – one layer at a time

November 8, 2018
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With the recent midterm elections here in the US, I frequently saw congressional district maps popping up in the news. And being a GraphGuy, I wanted to fully understand these maps, to see if I might could improve them. If you're interested in congress...
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Visualize the feasible region for a constrained optimization

November 7, 2018
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Visualize the feasible region for a constrained optimization

When solving optimization problems, it is harder to specify a constrained optimization than an unconstrained one. A constrained optimization requires that you specify multiple constraints. One little typo or a missing minus sign can result in an infeasible problem or a solution that is unrelated to the true problem. This

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Creating a custom ‘I Voted’ sticker

November 6, 2018
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With today being an election day here in the US, I see a lot of people wearing the 'I Voted' sticker. This got me wondering if I could create my own sticker ... using SAS software and simple graphics primitives. :-) So I started by using Proc Gslide to create

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Reporting on accelerometer data with SAS Visual Analytics

November 6, 2018
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Reporting on accelerometer data with SAS Visual Analytics

I've collected accelerometer data with a third-party app. I've used some SAS tricks to import all of my data readings in a single step. Now I'm ready to create a report of these data in SAS Visual Analytics.

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Fit the Pareto distribution in SAS

November 5, 2018
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Fit the Pareto distribution in SAS

Will the real Pareto distribution please stand up? SAS supports three different distributions that are named "Pareto." The Wikipedia page for the Pareto distribution lists five different "Pareto" distributions, including the three that SAS supports. This article shows how to fit the two-parameter Pareto distribution in SAS and discusses the

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Visualizing cities as constellations in the night sky

November 2, 2018
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Who says technical people can't have fun!?! Similar to Throwback Thursday / #TBT (when people post one of their old/nostalgic photos on social media), I like the tradition of Fun Friday when I use a fun data topic to test our software - a test can be j...
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